I'm working in an environment that only allows outgoing Internet access
through their ISA proxy server.
Unfortunately the do not allow basic authentication to the ISA, only NTLM.

I haven't been able to get the Yast proxy to work with the ISA (perhaps
someone has a solution to this) and therefore they decided to allow
outgoing Internet access from the SLES servers to only the needed domains;

However this doesn't seem to be sufficient as it's not possible to register
new machines with NCC. Looking at a packet trace it seems it also
needs to access a akamai solution. Does someone know what exact
servers are used for the akamai solution?

I'm also aware there is the SMT, once the install grows beyond todays 3
servers I'm planning to set this up in the environment.